. >>> lance armstrong today confessed to oprah winfrey that he took performance enhancing drugs to win the tour de france. lance armstrong was stripped of all tour de france titles after a investigation uncovered a doping regime for him and his teammates. lance armstrong sent a text saying i told her to go wherever she wants and i will answer the questions directly, honestly and candedly. -- candidly. >>> police are trying to track down a man suspected in two robberies. he is armed and dangerous. he is suspected of robbing a wall administer store and -- walmart store and another one. >>> child pornography can spread on facebook but now facebook is turning the tables. new at 6:00 p.m. ktvu's tom vacar is live in menlow park with the new war online against child pornographers. >> reporter: avenue online photo-- over online photo has its unique digital signature. >> reporter: many photos photos and videos are shared privately. >> the social network would have to have a reason to look. >> reporter: the reason, facebook prevents illegal activities giving it a right to look and they gave the